428 Dr. P. P. Carpenter on new Forms of Mollusca. 
mellar thread for two whirls only. Opereulum normal, with 
thin edge, dark red. 
32. Lacuna porrecta. 
L. testa L. putcolo simili, sed multo majore, spira magis exserta ; 
seu omnino fusea, seu zona pallidiore, seu pallida lineolis fusces- 
centibus tenuissime spiraliter ornata; epidermide tenuiter striata 
olivacea seu viridescente induta; tenuiore, spiraliter tenuiter striata; 
anfr. v., vix planatis, rapide augentibus, suturis impressis, vertice 
mamillato ; apertura tumente ; labio tenui, vix parietem attingente, 
intus subrecto; lacuna maxima, elongata, ad basin arcuata; peri- 
pheria expansa. Long. °52, long. spir. °2, lat. -4, div. 80°. 
Var. effusa: testa L.porrecte simili, sed multo majore ; spira elevata, 
satis effusa ; anfr. tumidioribus, suturis valde impressis ; aperturam 
versus magis expansa. Long. *65, long. spir. *25, lat. *5, div. 60°. 
?Var. evaquata : testa D. cfiusce shalt sed anfr. ie suturis 
parum impressis. Long. °5, long. spir. °2, lat. *42, div. 80°, 
Hab. Neeah Bay (Swan). 
The form L. exequata is intermediate between the very dif- 
ferent L. porrecta and L. effusa. The Lacune vary so much 
(vide Forbes & Hanley zn loco) that, even with a large multitude 
of specimens, it is not easy to state what constitutes a species. 
33. Lacuna (? solidula, var.) compacta. 
L. testa L. solidule, var., simili; parva, solida, compacta, angusta, 
subturrita, marginibus spiree excurvatis : aurantiaca, interdum pal- 
lidiore zonata; anfr. subplanatis, suturis distinctis ; tota superficie 
confertissime spiraliter striolata ; basi valde angulata, subplanata ; 
apertura subquadrata; columella vix lacunata. Long. *23, long. 
spirmel, lat..17, div. 607 
Variat testa elongata: variat quoque columella normaliter lacunata. 
Hab. Neeah Bay (Swan). 
Possibly an extreme form of the very variable L. solidula, Lov. 
(= L. cariata, Gld., non A. Ad., = Modelia striata, Gabb), yet 
distinct in all ages. The young shells resemble small Litorine. 
34, Lacuna variegata. 
L. testa tenui, plus minusve elevata, soluta, irregulari; adolescente 
fusco-purpureo ; adulta livida, radiatim seu diagonaliter varie ir- 
regulariter strigata, strigis fusco-aurantiacis, seepe ziczacformibus ; 
antr. vi., quorum primi compacti, apice submamillato ; dein solutis, 
postice planatis, antice expansis ; basi rotundata seu angulata ; ; 
apertura subovata ; labro postice porrecto ; labio szepe parietem vix 
attingente ; columella intus recta, extus valde lacunata. Long. 3, 
long. spir. +16, lat. +17, div. 50°. 
Hab. Neeah Bay (Swan). 
Painted like L. decorata, A. Ad., which differs in having a 
normal growth, with very slight chink. 
